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        <h3 id="1-安装Java-JDK"><a href="#1-安装Java-JDK" class="headerlink" title="1.安装Java JDK"></a>1.安装Java JDK</h3><figure class="highlight routeros"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div></pre></td><td class="code"><pre><div class="line"><span class="comment">#编辑配置文件</span></div><div class="line">vim /etc<span class="built_in">/profile </span>  </div><div class="line">      </div><div class="line"><span class="comment">#添加以下内容</span></div><div class="line"><span class="builtin-name">export</span> <span class="attribute">JAVA_HOME</span>=/usr/local/java/jdk1.7.0_79</div><div class="line"><span class="builtin-name">export</span> <span class="attribute">PATH</span>=<span class="variable">$JAVA_HOME</span>/bin:$PATH</div><div class="line"><span class="builtin-name">export</span> <span class="attribute">CLASSPATH</span>=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar</div><div class="line"></div><div class="line"><span class="comment">#使环境变量生效</span></div><div class="line">source /etc/profile</div><div class="line"></div><div class="line"><span class="comment">#查看环境变量配置是否成功</span></div><div class="line">java -version</div></pre></td></tr></table></figure>
<h3 id="2-创建一个新用户"><a href="#2-创建一个新用户" class="headerlink" title="2.创建一个新用户"></a>2.创建一个新用户</h3><figure class="highlight shell"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div></pre></td><td class="code"><pre><div class="line"><span class="meta">#</span><span class="bash">新建用户</span></div><div class="line">useradd hadoop</div><div class="line"></div><div class="line"><span class="meta">#</span><span class="bash">设置密码</span></div><div class="line">passwd hadoop</div></pre></td></tr></table></figure>
<h3 id="3-下载Hadoop"><a href="#3-下载Hadoop" class="headerlink" title="3.下载Hadoop"></a>3.下载Hadoop</h3><p><a href="http://mirrors.hust.edu.cn/apache/hadoop/common/hadoop-2.7.5/hadoop-2.7.5.tar.gz" target="_blank" rel="external">hadoop-2.7.5.tar.gz</a></p>
<figure class="highlight jboss-cli"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div></pre></td><td class="code"><pre><div class="line"><span class="comment">#解压tar包</span></div><div class="line">tar xfz hadoop-2.7.5.tar.gz</div><div class="line"></div><div class="line"><span class="comment">#移动到/opt目录</span></div><div class="line">mkdir <span class="string">/opt/hadoop</span></div><div class="line">mv hadoop-2.7.5/* <span class="string">/opt/hadoop</span></div><div class="line"></div><div class="line"><span class="comment">#更改目录所有者为hadoop</span></div><div class="line">chown -R hadoop<span class="function">:hadoop</span> <span class="string">/opt/hadoop/</span></div></pre></td></tr></table></figure>
<h3 id="4-配置ssh免密登录"><a href="#4-配置ssh免密登录" class="headerlink" title="4.配置ssh免密登录"></a>4.配置ssh免密登录</h3><figure class="highlight ruby"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div></pre></td><td class="code"><pre><div class="line">*<span class="comment">#登录hadoop用户</span></div><div class="line">su - hadoop</div><div class="line"></div><div class="line"><span class="comment">#首先，生成SSH秘钥，生成的私钥文件默认位置是~/.ssh/id_rsa.pub</span></div><div class="line">ssh-keygen -t rsa </div><div class="line"></div><div class="line"><span class="comment">#将私钥写入~/.ssh/authorized_keys</span></div><div class="line">cat ~<span class="regexp">/.ssh/id</span>_rsa.pub <span class="meta">&gt;&gt; </span>~<span class="regexp">/.ssh/authorized</span>_keys</div><div class="line"></div><div class="line"><span class="comment">#尝试使用ssh登陆localhost，应该不再需要输入密码</span></div><div class="line">ssh localhost</div><div class="line"></div><div class="line"><span class="comment">#非root用户设置本地ssh免密登录失败，需要给authorized_keys文件授权</span></div><div class="line">chmod <span class="number">710</span> ~<span class="regexp">/.ssh/authorized</span>_keys</div><div class="line">ssh localhost</div></pre></td></tr></table></figure>
<h3 id="5-配置hadoop"><a href="#5-配置hadoop" class="headerlink" title="5.配置hadoop"></a>5.配置hadoop</h3><ul>
<li>添加环境变量，编辑/etc/profile文件</li>
</ul>
<figure class="highlight vim"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">vim</span> /etc/<span class="keyword">profile</span></div></pre></td></tr></table></figure>
<ul>
<li>配置hadoop环境变量</li>
</ul>
<figure class="highlight routeros"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div></pre></td><td class="code"><pre><div class="line"><span class="builtin-name">export</span> <span class="attribute">HADOOP_HOME</span>=/opt/hadoop</div><div class="line"><span class="builtin-name">export</span> <span class="attribute">HADOOP_INSTALL</span>=<span class="variable">$HADOOP_HOME</span></div><div class="line"><span class="builtin-name">export</span> <span class="attribute">HADOOP_MAPRED_HOME</span>=<span class="variable">$HADOOP_HOME</span></div><div class="line"><span class="builtin-name">export</span> <span class="attribute">HADOOP_COMMON_HOME</span>=<span class="variable">$HADOOP_HOME</span></div><div class="line"><span class="builtin-name">export</span> <span class="attribute">HADOOP_HDFS_HOME</span>=<span class="variable">$HADOOP_HOME</span></div><div class="line"><span class="builtin-name">export</span> <span class="attribute">YARN_HOME</span>=<span class="variable">$HADOOP_HOME</span></div><div class="line"><span class="builtin-name">export</span> <span class="attribute">HADOOP_COMMON_LIB_NATIVE_DIR</span>=<span class="variable">$HADOOP_HOME</span>/lib/native</div><div class="line"><span class="builtin-name">export</span> <span class="attribute">PATH</span>=<span class="variable">$PATH</span>:$HADOOP_HOME/sbin:$HADOOP_HOME/bin</div></pre></td></tr></table></figure>
<ul>
<li>使环境变量生效</li>
</ul>
<figure class="highlight gradle"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">source</span> <span class="regexp">/etc/</span>profile</div></pre></td></tr></table></figure>
<ul>
<li>编辑hadoop-env.sh文件</li>
</ul>
<figure class="highlight stata"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">cd</span> <span class="variable">$HADOOP_HOME</span>/etc/hadoop</div><div class="line">vim hadoop-env.<span class="keyword">sh</span></div></pre></td></tr></table></figure>
<ul>
<li>将export JAVA_HOME=${JAVA_HOME}改为如下</li>
</ul>
<figure class="highlight routeros"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line"><span class="builtin-name">export</span> <span class="attribute">JAVA_HOME</span>=/usr/local/java/jdk1.7.0_79</div></pre></td></tr></table></figure>
<ul>
<li>编辑core-site.xml文件，configuration中的内容</li>
</ul>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">configuration</span>&gt;</span></div><div class="line"><span class="tag">&lt;<span class="name">property</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">name</span>&gt;</span>fs.default.name<span class="tag">&lt;/<span class="name">name</span>&gt;</span></div><div class="line">    <span class="tag">&lt;<span class="name">value</span>&gt;</span>hdfs://localhost:9000<span class="tag">&lt;/<span class="name">value</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">property</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">configuration</span>&gt;</span></div></pre></td></tr></table></figure>
<ul>
<li>编辑hdfs-site.xml文件，configuration中的内容</li>
</ul>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">configuration</span>&gt;</span></div><div class="line"><span class="tag">&lt;<span class="name">property</span>&gt;</span></div><div class="line"> <span class="tag">&lt;<span class="name">name</span>&gt;</span>dfs.replication<span class="tag">&lt;/<span class="name">name</span>&gt;</span></div><div class="line"> <span class="tag">&lt;<span class="name">value</span>&gt;</span>1<span class="tag">&lt;/<span class="name">value</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">property</span>&gt;</span></div><div class="line"> </div><div class="line"><span class="tag">&lt;<span class="name">property</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">name</span>&gt;</span>dfs.name.dir<span class="tag">&lt;/<span class="name">name</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">value</span>&gt;</span>file:///opt/hadoop/hadoopdata/namenode<span class="tag">&lt;/<span class="name">value</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">property</span>&gt;</span></div><div class="line"> </div><div class="line"><span class="tag">&lt;<span class="name">property</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">name</span>&gt;</span>dfs.data.dir<span class="tag">&lt;/<span class="name">name</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">value</span>&gt;</span>file:///opt/hadoop/hadoopdata/datanode<span class="tag">&lt;/<span class="name">value</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">property</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">configuration</span>&gt;</span></div></pre></td></tr></table></figure>
<ul>
<li>创建目录</li>
</ul>
<figure class="highlight vim"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div></pre></td><td class="code"><pre><div class="line"><span class="built_in">mkdir</span> /<span class="keyword">opt</span>/hadoop/hadoopdata</div><div class="line"><span class="built_in">mkdir</span> /<span class="keyword">opt</span>/hadoop/hadoopdata/namenode</div><div class="line"><span class="built_in">mkdir</span> /<span class="keyword">opt</span>/hadoop/hadoopdata/datanode</div></pre></td></tr></table></figure>
<ul>
<li>创建mapred-site.xml文件</li>
</ul>
<figure class="highlight css"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line"><span class="selector-tag">cp</span> <span class="selector-tag">mapred-site</span><span class="selector-class">.xml</span><span class="selector-class">.template</span> <span class="selector-tag">mapred-site</span><span class="selector-class">.xml</span></div></pre></td></tr></table></figure>
<ul>
<li>编辑mapred-site.xml文件，configuration中的内容</li>
</ul>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">configuration</span>&gt;</span></div><div class="line"> <span class="tag">&lt;<span class="name">property</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">name</span>&gt;</span>mapreduce.framework.name<span class="tag">&lt;/<span class="name">name</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">value</span>&gt;</span>yarn<span class="tag">&lt;/<span class="name">value</span>&gt;</span></div><div class="line"> <span class="tag">&lt;/<span class="name">property</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">configuration</span>&gt;</span></div></pre></td></tr></table></figure>
<ul>
<li>编辑yarn-site.xml文件，configuration中的内容</li>
</ul>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">configuration</span>&gt;</span></div><div class="line"><span class="comment">&lt;!-- Site specific YARN configuration properties --&gt;</span></div><div class="line"><span class="tag">&lt;<span class="name">property</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">name</span>&gt;</span>yarn.nodemanager.aux-services<span class="tag">&lt;/<span class="name">name</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">value</span>&gt;</span>mapreduce_shuffle<span class="tag">&lt;/<span class="name">value</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">property</span>&gt;</span> </div><div class="line"><span class="tag">&lt;/<span class="name">configuration</span>&gt;</span></div></pre></td></tr></table></figure>
<ul>
<li>初始化HDFS文件系统</li>
</ul>
<figure class="highlight dos"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">hdfs namenode -<span class="built_in">format</span></div></pre></td></tr></table></figure>
<h3 id="6-启动服务"><a href="#6-启动服务" class="headerlink" title="6.启动服务"></a>6.启动服务</h3><figure class="highlight shell"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div></pre></td><td class="code"><pre><div class="line"><span class="meta">#</span><span class="bash">进入sbin文件夹</span></div><div class="line">cd /opt/hadoop/sbin</div><div class="line"></div><div class="line"><span class="meta">#</span><span class="bash">启动Hadoop服务</span></div><div class="line">start-dfs.sh</div><div class="line"></div><div class="line"><span class="meta">#</span><span class="bash">启动yarn</span></div><div class="line">start-yarn.sh</div><div class="line"></div><div class="line"><span class="meta">#</span><span class="bash">查看服务运行状态</span></div><div class="line">jps</div></pre></td></tr></table></figure>
<h3 id="7-测试"><a href="#7-测试" class="headerlink" title="7.测试"></a>7.测试</h3><p>访问主机端口50070或8088查看</p>

      
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